chore: upgrade coredns version (#550)

vendor/github.com/expr-lang/expr/optimizer/in_range.go

@@ -0,0 +1,43 @@
+package optimizer
+
+import (
+	"reflect"
+
+	. "github.com/expr-lang/expr/ast"
+)
+
+type inRange struct{}
+
+func (*inRange) Visit(node *Node) {
+	switch n := (*node).(type) {
+	case *BinaryNode:
+		if n.Operator == "in" {
+			t := n.Left.Type()
+			if t == nil {
+				return
+			}
+			if t.Kind() != reflect.Int {
+				return
+			}
+			if rangeOp, ok := n.Right.(*BinaryNode); ok && rangeOp.Operator == ".." {
+				if from, ok := rangeOp.Left.(*IntegerNode); ok {
+					if to, ok := rangeOp.Right.(*IntegerNode); ok {
+						patchCopyType(node, &BinaryNode{
+							Operator: "and",
+							Left: &BinaryNode{
+								Operator: ">=",
+								Left:     n.Left,
+								Right:    from,
+							},
+							Right: &BinaryNode{
+								Operator: "<=",
+								Left:     n.Left,
+								Right:    to,
+							},
+						})
+					}
+				}
+			}
+		}
+	}
+}